Infrared monitoring of underground CO2 storage using chalcogenide glass fibers
Infrared monitoring of underground CO2 storage using chalcogenide glass fibers
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DOI：
10.1016/j.optmat.2007.10.014
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发表时间：
2009-01-01
影响因子：
3.9
通讯作者：
Adam, Jean-Luc
中科院分区：
文献类型：
--
作者：
Charpentier, Frederic;Bureau, Bruno;Adam, Jean-Luc
研究了一种基于光纤的系统，适用于监测二氧化碳，即所谓的“温室气体”的存在。由于每种污染物气体在中红外(MID-IR)中都显示出特征的光学吸收光谱，因此可以通过分析中红外光谱来选择性和定量地检测特定环境中气体的存在。二氧化碳气体的主要红外特征是位于4.2微米处的双吸收峰。硫化物光纤可以在1-6微米范围内传输光，非常适合二氧化碳分析。在此波长范围内，它们的衰减损耗优于其他类型的光纤，如卤化银光纤。本文建立了二氧化碳的检测下限与光程长度的函数关系。对传感器的可逆性、响应时间和恢复时间等动态参数进行了研究。因此，基于硫化物玻璃的光纤可用于将红外光从黑体源传输到遥远的二氧化碳地质储存区，以便实时监测二氧化碳气体泄漏。(C)2007 Elsevier B.V.保留所有权利。
An optical-fiber-based system suitable for monitoring the presence of carbon dioxide, so-called "greenhouse gas", is investigated. Since each pollutant gas shows a characteristic optical absorption spectrum in the mid-infrared (mid-IR), it is possible to detect selectively and quantitatively the presence of gases in a given environment by analysing mid-IR spectra. The main infrared signature of carbon dioxide gas is a double absorption peak located at 4.2 mu m. Chalcogenide optical fibers, which can transmit light in the 1-6 mu m range, are well-adapted for CO2 analysis. In this wavelength range, they show attenuation losses that compare favourably with other types of fiber such as silver halide fibers. In this paper, the detection limit of CO2 is established as a function of optical path length. The dynamic parameters of the sensors, such as reversibility, response time and recovery time, are also studied. It is concluded that optical fibers based on chalcogenide glasses could be used to transport infrared light from a black body source to a remote CO2 geological storage zone in order to monitor, in real time, CO2 gas leakage. (C) 2007 Elsevier B.V. All rights reserved.